US5930737A - Measurement system using double CPU modules for human machine interface control and measurement module control - Google Patents

Measurement system using double CPU modules for human machine interface control and measurement module control Download PDF

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Publication number
US5930737A
US5930737A US08/994,166 US99416697A US5930737A US 5930737 A US5930737 A US 5930737A US 99416697 A US99416697 A US 99416697A US 5930737 A US5930737 A US 5930737A
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measurement
cpu module
module
bus
modules
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Nobukazu Banjo
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Yokogawa Electric Corp
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Ando Electric Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4004—Coupling between buses
    • G06F13/4027—Coupling between buses using bus bridges

Definitions

  • This invention relates to measurement systems which control measurement devices to enable data processing for measurement in real time.
  • This application is based on patent application No. Hei 8-349102 filed in Japan, the content of which is incorporated herein by reference.
  • FIG. 3 is a block diagram showing an example of a measurement system.
  • a block 13 corresponds to a CPU module 13 which performs a variety of processes and controls while a block 14 corresponds to measurement modules that perform measurement with respect to certain measured values.
  • the CPU module 13 and measurement modules 14 are connected together by a bus system 15.
  • a block 16 corresponds to human-machine interface functions (abbreviated by "HMI").
  • the CPU module 13 is configured by a measurement module control block 17, a data processing block 18 and a HMI control block 19.
  • the measurement module control block 17 controls the measurement modules 14; the data processing block 18 performs analytical processing of measurement data; and HMI control block 19 controls human-machine interface factors such as the display that are being actualized by the HMI block 16.
  • the HMI block 16 is actualized by a display device, a data input device and the like, which are used to enter input measurement parameters. Such input measurement parameters input by the HMI block 16 are supplied to the HMI control block 19. So, the HMI control block 19 analyzes the input measurement parameters. Based on results of analysis, the HMI control block 19 accesses the measurement module control block 17 to set certain measurement parameters for the measurement modules 14 (see step C1).
  • the HMI block 16 issues a measurement start instruction. So, the measurement module control block 17 controls the measurement modules 14 to start measurement in accordance with the measurement parameters (see step C2).
  • the measurement modules 14 When a condition is satisfied so that measurement data can be read, the measurement modules 14 output signals to the measurement module control block 17 (see step C3). So, the measurement module control block 17 reads the measurement data from the measurement modules 14, so that the measurement data are supplied to the data processing block 18 (see step C4).
  • the data processing block 18 analyzes the measurement data, so that results of analysis are supplied to the HMI control block 19 (see step C5).
  • the HMI control block 19 processes the results of analysis to match with forms suited to the functions of the HMI block 16. So, the results of analysis are supplied to the HMI block 16 (see step C6).
  • program control passes to the measurement module control block 17.
  • the measurement module control block 17 declares a completion of the measurement. If not, the measurement module control block 17 waits for a moment when the measurement modules 14 are ready to read data (see a flow of steps C7 and C3). If it becomes possible to read data from the measurement modules 14, the aforementioned steps are repeated so that measurement data are read and are subjected to analysis. The steps C3 to C7 are repeated until the measurement completion condition is satisfied.
  • the measurement modules are capable of setting multiple measurement parameters in response to a variety of measurement functions.
  • an amount of information contained in measurement data is increased in response to high performance which is required for the measurement modules. For this reason, a problem arises because the character-base HMI using the character user interface (abbreviated by "CUI”) cannot display all pieces of information corresponding to the measurement data efficiently.
  • CLI character user interface
  • the HMI graphical user interface
  • the foregoing measurement system is designed to perform control of the HMI using a single CPU module. So, if the HMI such as the GUI having a large scale in software is constructed, the CPU module 13 should require much processing time for the control of the HMI. Further, in order to analyze the measurement data whose amount is increased due to the high performance of the measurement modules, it is necessary to increase a load to the data processing block 18 in the CPU module 13.
  • the measurement parameters input by the HMI 16 contain measurement timing to perform measurement, so it is necessary to perform processing of the measurement module control block 17 first.
  • the CPU module 13 requires a large part of the processing time thereof for the HMI control block 19 and the data processing block 18. So, in some cases, a time delay may occur in control of the measurement modules 14 by the measurement module control block 17. A problem arises because a single CPU module cannot respond to the demand of the measurement modules in real time.
  • the measurement system of this invention is provided to perform analysis and display of measurement data representing results of measurement which is performed using measurement modules with respect to prescribed measured values.
  • a large scale graphical user interface is constructed for a human-machine interface which provides a display as well as a data input.
  • the measurement system of this invention is characterized by employing double CPU modules for sharing loads of the data processing required for the GUI and measurement modules respectively.
  • a first CPU module is exclusively provided for controlling the human-machine interface and for performing data processing such as analysis of the measurement data while a second CPU module is used for controlling the measurement modules to obtain the measurement data.
  • the first CPU module uses a first bus system for communications while the second CPU module uses a second bus system for communications with respect to the measurement modules.
  • a bus exchanger provides connections between the first and second bus systems.
  • FIG. 1 is a block diagram showing a configuration of a measurement system in accordance with an embodiment of the invention
  • FIGS. 2A and 2B are flowcharts showing steps respectively executed by CPU modules contained in the measurement system of FIG. 1;
  • FIG. 3 is a block diagram showing an example of a measurement system
  • FIG. 4 is a flowchart showing operation of the measurement system of FIG. 3.
  • FIG. 1 is a block diagram showing a configuration of a measurement system in accordance with an embodiment of the invention.
  • blocks 1 and 2 correspond to CPU modules respectively while a block 5 corresponds to a bus exchanger which is capable of providing connections using a same bus system or different bus systems.
  • the CPU module 1 uses a bus system 3 while the CPU module 2 uses a bus system 4.
  • the bus systems 3 and 4 are connected to the bus exchanger 5.
  • a block 6 corresponds to a human-machine interface (i.e., HMI) containing a display device, a data-input device and the like while a block 7 corresponds to measurement modules.
  • HMI human-machine interface
  • the CPU module 1 is configured by a HMI control block 8 for controlling the display and the like, a data processing block 9 for performing analytical processing on measurement data, and a communication block 10 for controlling communications with another CPU module.
  • the CPU module 2 is configured by a measurement module control block 11 for controlling the measurement modules 7 and a communication block 12 for controlling communications with another CPU module.
  • FIG. 2A is a flowchart showing a flow of steps executed by the CPU module 1 while FIG. 2B is a flowchart showing a flow of steps executed by the CPU module 2.
  • Arrows ( ⁇ ) drawn between the flowcharts of FIGS. 2A and 2B show directions of communications between steps of the CPU modules.
  • an explanation of the operation of the measurement system is made by describing the operation of both CPU modules together.
  • the HMI control block 8 loads and analyzes measurement parameters input by the HMI 6 (see step A1).
  • the measurement parameters correspond to measurement conditions such as the measurement time and a number of times to perform measurement.
  • the CPU module 1 checks whether the input parameters belong to an effective range of measurement or not.
  • the CPU module 1 transmits of the measurement parameter, analyzed by the HMI control block 8, toward the CPU module 2 (see step A2).
  • the bus exchanger 5 is designed to recognize the CPU module 2 connected thereto as a functional module which is controlled by the CPU of the CPU module 1. That is, the communication block 10 performs control (i.e., communication) on the CPU module 2 connected to the bus exchanger 5 as the functional module controlled by the CPU of the CPU module 1. In other words, the communication block 10 performs a write operation to write data into the CPU module 2 which the bus exchanger 5 recognizes as the functional module. Thus, it is possible to transmits of data with respect to the CPU module 2.
  • the communication block 10 periodically determines whether or not data exist in the CPU module 2 which is recognized as the functional block. If the data exist in the CPU module 2, the communication block 10 loads the data from the CPU module 2.
  • the communication block 10 loads the data from the CPU module 2 under a condition to receive an interrupt instruction from the CPU module 2. Thus, it is possible to receive data from the CPU module 2. Similar operations of the communication block 10 described above are employed by the communication block 12 of the CPU module 2. Thus, it is possible to realize communications between the CPU modules 1 and 2.
  • the CPU module 2 receives the measurement parameters of the CPU module 1, which are transmitted thereto via the bus exchanger 5, by means of the communication block 12. Then, the CPU module 2 uses the measurement module control block 11 to set the measurement parameters to the measurement modules 7.
  • a measurement start instruction is supplied by the HMI 6.
  • the measurement start instruction is supplied to the HMI control block 8, so that the CPU module 1 uses the communication block 10 to transmit the measurement start instruction to the CPU module 2.
  • the CPU module 2 receives the measurement start instruction which is transmitted thereto via the bus exchanger 5.
  • the measurement start instruction is received by the communication block 12.
  • the CPU module 2 starts measurement of the measurement modules 7 in accordance with the measurement parameters which are set in the step B1.
  • the measurement modules 7 When a condition is satisfied that the measurement modules 7 are ready to read measurement data corresponding to results of the measurement which is started in the step B2, the measurement modules 7 provide a read enable signal to the measurement module control block 11. So, the measurement module control block 11 confirms the read enable signal from the measurement modules 7 (see step B3), so that the CPU module 2 proceeds to a next step (i.e., step B4).
  • the measurement module control block 11 accesses the measurement modules 7 to read the measurement data (see step B4). Then, the CPU module 2 uses the communication block 12 to transmit the measurement data to the CPU module 1 (see step B5).
  • step B6 the CPU module 2 proceeds to step B6. If the present situation meets a measurement completion condition which is set in the aforementioned step B1, the measurement module control block 11 declares completion of the measurement. If not, the CPU module 2 proceeds back to step B3 so as to wait for another read enable condition that new measurement data can be read from the measurement modules 7. When it comes to the read enable condition that the new measurement data can be read from the measurement modules 7, the CPU module 2 reads the new measurement data (see step B4). Then, the aforementioned steps are repeated. Such a repetition of the steps is continuously made until the measurement completion condition is satisfied.
  • the CPU module 2 uses the communication block 12 to transmit a message of "measurement completion" to the CPU module 1 (see step B7). Thus, the CPU module 2 ends the processing thereof.
  • the CPU module 1 uses the communication block 10 to receive measurement results (i.e., measurement data) which are transmitted thereto from the CPU module 2 in the aforementioned step B5.
  • measurement results i.e., measurement data
  • step A5 the CPU module 1 uses the data processing block 9 to analyze the measurement data.
  • the data processing block 9 calculates values and deviations with respect to the measurement data.
  • results of the analysis made by the data processing block 9 are sent to the HMI control block 8 wherein they are processed to match with the prescribed forms suited to the display. So, an output of the HMI control block is forwarded to the HMI 6 (see step A6).
  • the prescribed forms suited to the display employed by the HMI control block 8 correspond to visual forms by which a human operator of the measurement can understand the measurement results with ease.
  • the display provides visual representation of the average values and the like as well as a graph showing time-series variations of the measurement data.
  • step A6 the CPU module 1 proceeds to step A7 to make a decision whether to receive a message of "measurement completion". If the CPU module 1 does not receive such a message, the CPU module 1 proceeds back to step A4, so it is placed in a standby state to wait for a time to receive next measurement data. Then, the steps A4 to A6 are repeated until the CPU module 1 receives the message of "measurement completion" from the CPU module 2. When receiving the message, the CPU module 1 completes the processing thereof.
  • the present embodiment is designed to share processes (or loads) between multiple CPU modules.
  • processes or loads
  • the CPU it is possible to provide additional processing capability of the CPU. This enables construction of a large scale GUI as well as analysis of a large number of measurement data while satisfying the real-time performance which the measurement modules request.
  • the foregoing embodiment merely provides an example of the measurement system which connects two CPU modules to the bus exchanger.
  • the forgoing embodiment can be modified to cope with a situation where the measurement modules each respond to different bus systems. Namely, in order to enable a single HMI to set different parameters with respect to the measurement modules in the above situation, it is possible to provide connections between the bus exchanger and a number of CPU modules each having a specific bus system to control each of the measurement modules, for example.
  • the present embodiment is designed such that the CPU module 1 uses the bus system 3 while the CPU module 2 uses the bus system 4.
  • the design of the measurement system is made based on the requirement that the CPU module 2 has the bus system which responds to the measurement modules. That is, it is possible to employ the same bus system for the bus systems 3 and 4 which the CPU modules 1 and 2 use respectively.

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  • Engineering & Computer Science (AREA)
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  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
US08/994,166 1996-12-26 1997-12-19 Measurement system using double CPU modules for human machine interface control and measurement module control Expired - Fee Related US5930737A (en)

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JP8349102A JPH10185634A (ja) 1996-12-26 1996-12-26 計測システム
JP8-349102 1996-12-26

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6088029A (en) * 1998-06-26 2000-07-11 Tektronix, Inc. Enhanced display of a control window in a measurement instrument
US6584419B1 (en) * 2000-10-12 2003-06-24 Agilent Technologies, Inc. System and method for enabling an operator to analyze a database of acquired signal pulse characteristics
CN101149741B (zh) * 2006-06-29 2010-06-16 洛克威尔自动控制技术股份有限公司 利用gui功能块的自动化hmi可视化
WO2012000295A1 (zh) * 2010-06-30 2012-01-05 大连理工大学 双mcu控制多通道高速模拟信号采集器
CN103901878A (zh) * 2014-03-26 2014-07-02 山推建友机械股份有限公司 一种混凝土搅拌站远程故障诊断系统及方法
CN107193525A (zh) * 2017-03-30 2017-09-22 深圳市海浦蒙特科技有限公司 变频器操作面板显示方法及显示系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100471234B1 (ko) * 2002-06-28 2005-03-10 현대자동차주식회사 차량통합 표시장치에서 에치 엠 아이의 메시지전달방법
KR100507078B1 (ko) * 2002-09-13 2005-08-09 현대자동차주식회사 차량통합 표시장치의 에치 엠 아이 데이터 관리방법
CN106525116A (zh) * 2016-12-26 2017-03-22 海克斯康测量技术(青岛)有限公司 一种实时在线测量装置及其方法

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US4907146A (en) * 1986-10-07 1990-03-06 Giancarlo Caporali Interactive video network between one master computer and a plurality of slave computers
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6088029A (en) * 1998-06-26 2000-07-11 Tektronix, Inc. Enhanced display of a control window in a measurement instrument
US6584419B1 (en) * 2000-10-12 2003-06-24 Agilent Technologies, Inc. System and method for enabling an operator to analyze a database of acquired signal pulse characteristics
CN101149741B (zh) * 2006-06-29 2010-06-16 洛克威尔自动控制技术股份有限公司 利用gui功能块的自动化hmi可视化
WO2012000295A1 (zh) * 2010-06-30 2012-01-05 大连理工大学 双mcu控制多通道高速模拟信号采集器
CN103901878A (zh) * 2014-03-26 2014-07-02 山推建友机械股份有限公司 一种混凝土搅拌站远程故障诊断系统及方法
CN103901878B (zh) * 2014-03-26 2016-08-24 山推建友机械股份有限公司 一种混凝土搅拌站远程故障诊断系统及方法
CN107193525A (zh) * 2017-03-30 2017-09-22 深圳市海浦蒙特科技有限公司 变频器操作面板显示方法及显示系统

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